Não informado. (1993). New Steel Construction. British Constructional Steelwork Association.
Chicago-referens (17:e uppl.)Não informado. New Steel Construction. Birmingham, Inglaterra: British Constructional Steelwork Association, 1993.
MLA-referens (8:e uppl.)Não informado. New Steel Construction. British Constructional Steelwork Association, 1993.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.